Henry William Jeans Livres

This classic textbook on trigonometry provides a thorough and rigorous treatment of the subject. With detailed explanations of both plane and spherical trigonometry, as well as numerous worked examples and practice problems, it's an excellent resource for students and teachers alike. Whether you're studying for a test or looking to deepen your understanding of this important mathematical field, this book is an essential guide.

This book is an essential guide for stargazers. With detailed rules for finding the names and positions of all the stars of the first and second magnitude, it enables readers to explore and understand the world of the stars. Written in a simple and easy-to-understand style, this guidebook is perfect for amateur astronomers, students, and teachers alike.